CD Technologies NPH155 User Manual
NPH15S SERIES
Isolated 15W Single Output DC-DC Converters
SELECTION GUIDE
FEATURES
■ High Efficiency to 89%
■ Power Density up to 2.4W/cm
3
(39W/in3)
■ 1.5kV Input to Output Isolation
■ Industry Standard Pinout
■ UL 1950 Recognised
■ Non Latching Current Limit
■ Constant 350kHz Frequency
■ Versatile Control Options
■ Continuous Rating to 30W
at 40°C Without Heatsink
■ Operation to Zero Load
■ Protected Against Load Faults
■ Internal Over Temperature Protection
■ Uses No Electrolytic Capacitors
■ UL 94V-0 Package Materials
DESCRIPTION
The NPH15S series of DC-DC Converters
combines ease of application with versatility.
The pin pattern is based on the popular
industry standard, but two additional pins
may optionally be fitted to provide a variety
of features not commonly found on units of
this type. High efficiency enables full rating to
be achieved in a small package without
heatsinking, and a high surge capability will
provide for start-up and transient loads, whilst
being thermally protected against sustained
overload. Overload protection of the
“constant current” type ensures start-up
into complex load conditions. The copper
case achieves efficient heat transfer and
screening. The product range has been
recognised by Underwriters Laboratory (UL)
to UL 1950 for operational insulation, file
number E179522 applies.
Nominal Output Output Current
Input Voltage Voltage Current Limit Efficiency
Order Code
1
(V) (V) (mA) (A)Min (A)Max (%)
NPH15S2403i
24 3.4 4.4 7.5 11.0 81
NPH15S2405i
24 5.1 3.0 5.0 7.5 84
NPH15S2412i
24 12.1 1.3 2.5 3.7 86
NPH15S2415i
24 15.1 1.0 2.0 3.0 87
NPH15S4803i
48 3.4 4.4 7.5 11.0 83
NPH15S4805i
48 5.1 3.0 5.0 7.5 85
NPH15S4812i
48 12.1 1.3 2.5 3.7 88
NPH15S4815i
48 15.1 1.0 2.0 3.0 89
Parameter Conditions MIN NOM MAX Units
Voltage Range
Continuous operation, 24V input types 18 24 36
V
Continuous operation, 48V input types 36 48 75
Parameter Conditions MIN TYP MAX Units
Voltage Set
50% load 0.5 %
Point Error
Overall
Case temperature –40°C to 110°C
Voltage Error
Load 0% - 100% 2.5 %
Input specified range
Temperature Coefficient
of Output Voltage 250 ppm°C
(slope)
Deviation of
Output Voltage
Temperature MIN-MAX 0.5 1 %
Line Regulation Operating voltage range, 50% load 0.1 %
Load Regulation 0% - 100% rated load
2
0.5 %
Ripple rms 70 mV
Input voltage, 24V input types –0.5V to 40V
4
Input voltage, 48V input types –0.5V to 80V
4
Output Voltage –0.3V to regulated voltage
Output trim control –1V to +30V
Synchronisation/shutdown control ±15V relative to input return
INPUT CHARACTERISTICS
OUTPUT CHARACTERISTICS
Parameter Conditions MIN TYP MAX Units
Voltage Trimming At rated load,
±10 %
Range Trim control at either output
Remote Switch Input
3
Not operating -15 0 1.5
V(voltage relative
to input negative) Operating, open circuit voltage 9 10 11
Start Delay
Time from application of valid input
voltage to output being in specification
25 50 mS
Synchronisation
3
Specified drive signal 320 440 kHz
Switching Frequency 330 350 395 kHz
CONTROL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
ISOLATION CHARACTERISTICS
Parameter Conditions MIN TYP MAX Units
Isolation Voltage Flash tested for 1 second 1500 VDC
Resistance Viso=500VDC 1 4000 GΩ
1 If optional pins ADJ and SS are required (as indicated in the pin connections diagram) prefix the ending “i” with
an E when ordering, e.g. NPH15S4803Ei.
2A minimum load of 10% of rating is recommended for typical applications.
3 Optional where fitted.
4 Absolute maximum value for 30 seconds. Prolonged operation may damage the product.
All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified.
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NPH15S SERIES
Isolated 15W Single Output DC-DC Converters
C&D Technologies (NCL) Limited reserve the right to alter or improve the
specification, internal design or manufacturing process at any time, without
notice. Please check with your supplier or visit our web site to ensure that
you have the current and complete specification for your product before use.
For information and instructions on use, please consult the NPH SERIES
APPLICATION NOTES.
© C&D Technologies (NCL) Limited 2002 NDC NPH15S.5
No part of this publication may be copied, transmitted or stored in a
retrieval system or reproduced in any way including, but not limited to,
photography, photocopy, magnetic or other recording means, without prior
written permission from C&D Technologies (NCL) Limited.
Instructions for use are available from www.cdpoweronline.com
ENVIRONMENTAL
Parameter Conditions MIN TYP MAX Units
Case Temperature Full load –40 110 °C
Storage Absolute MAX internal temperature –40 125 °C
Relative Humidity Non condensing 85°C 85 %
Thermal Protection Operates at case temperature 110 °C
Weight: 36g
All dimensions in Inches(mm) ± 0.01(0.25)
All pins on a 0.10(2.54) pitch and within ±0.01(0.25) of true position
Case connected to 0V pin
1.97 (50.00)
0.80
(20.32)
0.58
(14.84)
0.98
(25.00)
0.80
20.32
0.4
(10.00)
0.18 (4.50)
0.15 (3.70)
Ø
0.40 (1.04)
0.04 (0.90)
SS
+V
IN
-V
IN
+V
OUT
ADJ
0V
0.39
(9.96)
0.20 (5.08)
0.09 (2.34)
THERMAL CHARACTERISTICS THERMAL PERFORMANCE
UL 1950 recognition -
MAX permissible loads for a given ambient temperature for any NPH15S model
Temperature (°C) Power (W) Temperature (°C) Power (W)
40 15.0 80 9.8
50 15.0 85 8.8
60 13.7 90 7.8
70 11.7
MAX power rating with case temperature maintained by external means
(eg forced air cooling)
Case Temperature
Part Number 100°C 105°C 110°C Units
NPH15S2403 19 16 12
NPH15S2405 22 19 15
W
NPH15S2412 25 22 19
NPH15S2415 26 24 21
NPH15S4803 20 17 13
NPH15S4805 23 20 16
W
NPH15S4812 28 26 23
NPH15S4815 30 28 25
MECHANICAL DIMENSIONS
35
30
25
20
15
10
5
0
-40 -20 0 20 40 60 80 100 120
Ambient Temperature (°C)
2412
2415
2405
2403
Output Power (W)
35
30
25
20
15
10
5
0
-40 -20 0 20 40 60 80 100 120
Ambient Temperature (°C)
Output Power (W)
4815
4812
4805
4803
BOTTOM VIEW
C&D Technologies (NCL) Ltd
Tanners Drive, Blakelands North
Milton Keynes MK14 5BU, England
Tel: +44 (0)1908 615232
Fax:+44 (0)1908 617545
email: info@cdtechno-ncl.com
www.cdpoweronline.com
C&D Technologies Inc.
3400 E Britannia Drive, Tucson,
Arizona 85706, USA
Tel: +1 (800) 547-2537
Fax: +1 (520) 741-4598
email: sales@cdtechno.com
0.20
(5.08)
0.20
(5.08)
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